I just finished quilting a customer's quilt which had dark to medium color fabrics with black backing. I used Hobb's Black 80/20. It quilted up lovely. This is not the first time that I have used the black batting. I prefer to use the black with dark quilts, the natural with most quilts, and the bleached 80/20 with quilts that contain a lot of white fabrics. I have never seen the migration through the backing using the different battings.